Produced by The Mare Island Historic Park Foundation: Step back in time and join us for a blast from the past! Celebrate 170 years of Mare Island's history at our Founders Day extravaganza. On September 15th, from 1 pm to 4 pm, immerse yourself in family fun, live music, silent auctions, and more. Entry is free, with paid activities for all ages. Don't miss this nostalgic celebration! Remember to bring your own chair for a comfortable day of festivities!